Seating unit back



FIG. 1 is a perspective view of a seating unit back according to the newdesign;

FIG. 2 is a left side view of the seating unit back shown in FIG. 1; theopposed right side view being a mirror image thereof;

FIG. 3 is a front view of the seating unit back shown in FIG. 1;

FIG. 4 is a rear view of the seating unit back shown in FIG. 1;

FIG. 5 is a top view of the seating unit back shown in FIG. 1; and,

FIG. 6 is a bottom view of the seating unit back shown in FIG. 1.

In the drawings, features in broken lines form no part of the claimeddesign.

I claim the ornamental design for a seating unit back, as shown anddescribed.